US10149028B2 - Die insert for molding a speaker grille - Google Patents
Die insert for molding a speaker grille Download PDFInfo
- Publication number
- US10149028B2 US10149028B2 US15/488,928 US201715488928A US10149028B2 US 10149028 B2 US10149028 B2 US 10149028B2 US 201715488928 A US201715488928 A US 201715488928A US 10149028 B2 US10149028 B2 US 10149028B2
- Authority
- US
- United States
- Prior art keywords
- insert
- die
- set forth
- forming member
- speaker grille
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/023—Screens for loudspeakers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2626—Moulds provided with a multiplicity of narrow cavities connected to a common cavity, e.g. for brushes, combs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2628—Moulds with mould parts forming holes in or through the moulded article, e.g. for bearing cages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/2673—Moulds with exchangeable mould parts, e.g. cassette moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/34—Moulds having venting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7312—Construction of heating or cooling fluid flow channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3418—Loud speakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
- H04R2201/029—Manufacturing aspects of enclosures transducers
Definitions
- the present invention relates generally toward an insert of a die for molding a speaker grille. More specifically, the general invention relates toward an improved configuration and substrate of an insert of a die for molding speaker grille.
- speaker grilles for use in automobiles have been integrated into, for example, door pads, package shelves, and other interior components of an automobile. Integrating speaker grilles into these components by way of a simple injection mold reduces complexity of assembling a door pad or package shelf.
- Various options, including differently configured speaker grilles, are available to meet the desires of an individual consumer. As such, a number of different inserts are adapted to mold a speaker grille simultaneously with that of a door pad substrate or other component.
- a die insert for forming a speaker grille typically includes a plurality of pins used to form a plurality of small acoustic openings in the speaker grille. The die insert is installed in a larger die used to form the substrate of a door pad or other component simultaneously with the speaker grille.
- An insert for a die for building a speaker grille includes a forming member including a forming surface defining a plurality of pins.
- the pins form acoustic openings in the speaker grille necessary for allowing sound generated from a speaker to pass into a passenger compartment.
- the forming surface defines a plurality of apertures disposed at spaced locations between the pins for venting gas from a die cavity while forming the speaker grille.
- the apertures are interconnected with a plurality of vent channels extending through the forming member venting the gas disposed in the die cavity when melted polymer is injected into the die to form the speaker grille.
- the forming member and the vent channels are defined by a monolithic construction.
- the monolithic construction of the present insert of a die for molding a speaker grille is achieved through three dimensional printing techniques so that the monolithic construction of the entire insert is achieved.
- the monolithic construction overcomes the deficiencies known to other venting techniques used to form speaker grilles that are complex and prone to break.
- the gas venting rates established by this technique exceeds the venting rate of a porous substrate, which reduces cycle time necessary to adequately form a speaker grille.
- FIG. 1 shows a side view of a die insert for forming a speaker grille
- FIG. 2 shows a partial perspective view of the die insert
- FIG. 3 shows a plan view of the forming surface of the die insert
- FIG. 4 shows a cross-sectional view of the die insert through line 4 - 4 of FIG. 3 ;
- FIG. 5 shows a further sectional view of the die insert
- FIG. 6 shows a bottom, prospective view of the die insert
- FIG. 7 shows a partial cross-sectional view of the die insert installed in an injection mold assembly.
- a die insert of the present invention for forming a speaker grille (not shown) is generally shown at 10 .
- the die insert 10 includes a forming member 12 that defines a forming surface 14 .
- the forming surface 14 defines a plurality of pins 16 used to form acoustic openings in the speaker grille.
- the die insert 10 fits within a complementary opening defined by a first die member 15 ( FIG. 7 ) used to form door pads, package shelfs, and other components of a vehicle in which it is desirable to form a speaker grille.
- a speaker grille is injection molded simultaneously with injection molding a vehicle component to provide efficiency and eliminate the need to form a separate speaker grille that is later mounted upon the vehicle component.
- An integrated speaker grille significantly reduces labor and cost associated with attaching a separate speaker grille to a vehicle component.
- the die insert 10 is defined by a monolithic construction, without moving parts.
- the die insert 10 is encased is defined as solid structure including an insert wall 18 .
- the material used to form the structure is substantially impermeable to gasses and polymers used to simultaneously form the speaker grill and vehicle component.
- the pins 16 are spaced in a predetermined pattern such that an aesthetically pleasing grille is formed integrally with the vehicle pad as will be explained further below with respect to FIG. 7 .
- the pins 16 are formed from a three dimensional printing process achieving a configuration that is near to dimensional intent. If necessary, electrical discharge machining or an equivalent machining process is performed on the pins 16 to achieve net dimensional intent.
- Channels 20 are defined in the forming surface 14 to provide structural support to the molded speaker grille, and further provide an aesthetically pleasing appearance for the speaker grille.
- the pins 16 extend between the channels 20 from a generally planer pin base 22 also defined by the forming surface 14 .
- the pin base 22 includes contours to meet functional design criteria or provide a different appearance.
- FIG. 4 a cross-sectional view of the die insert 10 of the present invention is shown along line 4 - 4 of FIG. 3 .
- a plurality of pin apertures 24 are defined by the pin base 22 between predetermined pins 16 .
- the channel apertures 25 are also located at a floor of the channels 20 providing further venting enabling the polymer to properly fill the channels 20 .
- the apertures 24 , 25 are sized to allow air or other gases to exit a die cavity 27 ( FIG. 7 ) during the component molding process while retaining liquefied polymer as will be explained further herein below. As such, efficient flow of the polymer between the pins 16 and through the channels 20 is achieved.
- the apertures 24 , 25 are interconnected to one or more a vent channels 26 .
- Each vent channel 26 leads to a central vent 28 that vents gases received through the apertures 24 , 25 to the atmosphere.
- the pins 16 are formed by way of three dimensional printing techniques. It should be understood that the entire insert 10 may be formed from by the three dimensional printing techniques. Forming the insert in this manner allows for the apertures 24 , 25 the vent channel 26 , and the vent 28 and all of the other elements of the insert 10 to be formed within a solid structure. Therefore, the entire insert 10 includes a monolithic construction without requiring additional machining for venting and without requiring multiple components being assembled to achieve necessary venting.
- a cooling channel 30 is also formed in the insert 10 and includes a cooling inlet 32 and a cooling outlet 34 .
- the cooling channel 30 provides for the flow of a cooling medium throughout the die insert 10 to increase the rate at which the liquefied polymer solidifies.
- the cooling channel 30 circumscribes the vent 28 at a location proximate the forming member 12 .
- the cooling channel 30 was formed within the die insert 10 without requiring machining or additional components.
- coolant supply lines are optionally affixed to the insert 10 at the coolant inlet 32 and the coolant outlet 34 through a printed and machined connector 33 without requiring additional coupling arrangements.
- Cooling the die insert 10 formed with a monolithic construction is not possible when the insert 10 is formed from a porous substrate.
- forming the die insert 10 of the present invention with a non-porous substrate with strategically placed venting provides the ability to cool the insert 10 without requiring complicated, and expensive external cooling features.
- the insert 10 is shown installed in an injection mold assembly generally shown at 36 .
- the assembly 10 defines the die cavity 27 between the first die member 15 and a second die member 17 .
- the assembly 36 is used to form an entire vehicle component simultaneously with the speaker grille as is set forth above.
- the assembly includes a plurality of runners 38 that are each interconnected with an extruder (not shown) for delivering liquefied polymer such as, for example, polypropylene, filled polypropylene or and equivalent to the die cavity 27 .
- the runners are spaced along one or both of the first die member 15 and the second die member 17 for efficient polymer flow into the die cavity 27 .
- the apertures 24 , 25 are space at locations in the insert 10 that most efficiently facilitates polymer flow through the die cavity 27 into the area of the forming surface 14 .
- clusters, or higher density of apertures 24 , 25 may be located in the forming surface 14 to provide additional venting where necessary to prevent empty spaces forming in the speaker grille resulting from gas pockets in the die cavity 27 .
Abstract
Description
Claims (10)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/488,928 US10149028B2 (en) | 2016-04-15 | 2017-04-17 | Die insert for molding a speaker grille |
US15/972,832 US10144164B2 (en) | 2016-04-15 | 2018-05-07 | Die insert for molding a speaker grille and method of forming same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201662323130P | 2016-04-15 | 2016-04-15 | |
US15/488,928 US10149028B2 (en) | 2016-04-15 | 2017-04-17 | Die insert for molding a speaker grille |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/972,832 Continuation-In-Part US10144164B2 (en) | 2016-04-15 | 2018-05-07 | Die insert for molding a speaker grille and method of forming same |
Publications (2)
Publication Number | Publication Date |
---|---|
US20170303021A1 US20170303021A1 (en) | 2017-10-19 |
US10149028B2 true US10149028B2 (en) | 2018-12-04 |
Family
ID=60039175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/488,928 Active 2037-07-25 US10149028B2 (en) | 2016-04-15 | 2017-04-17 | Die insert for molding a speaker grille |
Country Status (2)
Country | Link |
---|---|
US (1) | US10149028B2 (en) |
WO (1) | WO2017181170A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10144164B2 (en) * | 2016-04-15 | 2018-12-04 | Hi-Tech Mold & Engineering, Inc. | Die insert for molding a speaker grille and method of forming same |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3443281A (en) * | 1967-07-24 | 1969-05-13 | Rupert Mfg Co | Molding pin,matrix,and molding assembly for manufacture of reflective devices |
US3555620A (en) | 1967-10-17 | 1971-01-19 | Harry R Bucy | Mold for pressure injected material vented through ejector pin guides |
US3811647A (en) * | 1972-06-28 | 1974-05-21 | Ford Motor Co | Venting of electroform reflex inserts by laser drill |
US5356281A (en) | 1992-08-10 | 1994-10-18 | Three Bond Co., Ltd. | Screw-type resin injection apparatus for injection molding |
US5419865A (en) * | 1992-08-12 | 1995-05-30 | Tohoku Munekata Co., Ltd. | Plastic molding method |
US5665281A (en) | 1993-12-02 | 1997-09-09 | Motorola, Inc. | Method for molding using venting pin |
US5690886A (en) * | 1994-04-15 | 1997-11-25 | Nifco, Inc. | Method for molding a speaker grille |
US6164953A (en) | 1998-03-12 | 2000-12-26 | Patent Holding Company | Method and mold to make plastic articles having reduced surface defects and assembly for use therein |
US20020150274A1 (en) | 2001-04-11 | 2002-10-17 | Patent Holding Company | Plastic panel with integrally molded speaker grille |
US6533880B1 (en) * | 1999-03-01 | 2003-03-18 | Meridian Automotive Systems, Inc. | Method of making a combination speaker grill and automotive interior trim panel |
US20050257998A1 (en) | 2004-05-18 | 2005-11-24 | Pioneer Corporation | Method for manufacturing speaker-use center cap |
US20060134250A1 (en) * | 2004-12-22 | 2006-06-22 | Henrotte Eric M | Method and apparatus to vent a mold |
US20070145637A1 (en) | 2005-12-26 | 2007-06-28 | Pioneer Corporation | Method of manufacturing speaker edge member |
US20140014286A1 (en) | 2011-03-11 | 2014-01-16 | Sintokogio, Ltd. | Die-casting die |
US20160228942A1 (en) | 2013-10-30 | 2016-08-11 | Toyota Jidosha Kabushiki Kaisha | Mold forming apparatus |
US20180250860A1 (en) * | 2016-04-15 | 2018-09-06 | Hi-Tech Mold & Engineering, Inc. | Die insert for molding a speaker grille and method of forming same |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5266021A (en) * | 1991-10-10 | 1993-11-30 | Jacobson Theodore L | Apparatus for continuous forming of complex molded shapes |
US6660201B1 (en) * | 1999-03-01 | 2003-12-09 | Meridian Automotive Systems, Inc. | Method of making a combination speaker grill and automotive trim panel |
US9758852B2 (en) * | 2010-01-04 | 2017-09-12 | Crucible Intellectual Property, Llc | Amorphous alloy seal |
CN105848849B (en) * | 2013-11-04 | 2019-07-02 | 普莱斯提克斯恩邦德有限公司 | Pass through the method for injection-molding machine injection-moulded plastic part |
-
2017
- 2017-04-17 WO PCT/US2017/027899 patent/WO2017181170A1/en active Application Filing
- 2017-04-17 US US15/488,928 patent/US10149028B2/en active Active
Patent Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3443281A (en) * | 1967-07-24 | 1969-05-13 | Rupert Mfg Co | Molding pin,matrix,and molding assembly for manufacture of reflective devices |
US3555620A (en) | 1967-10-17 | 1971-01-19 | Harry R Bucy | Mold for pressure injected material vented through ejector pin guides |
US3811647A (en) * | 1972-06-28 | 1974-05-21 | Ford Motor Co | Venting of electroform reflex inserts by laser drill |
US5356281A (en) | 1992-08-10 | 1994-10-18 | Three Bond Co., Ltd. | Screw-type resin injection apparatus for injection molding |
US5419865A (en) * | 1992-08-12 | 1995-05-30 | Tohoku Munekata Co., Ltd. | Plastic molding method |
US5665281A (en) | 1993-12-02 | 1997-09-09 | Motorola, Inc. | Method for molding using venting pin |
US5690886A (en) * | 1994-04-15 | 1997-11-25 | Nifco, Inc. | Method for molding a speaker grille |
US6164953A (en) | 1998-03-12 | 2000-12-26 | Patent Holding Company | Method and mold to make plastic articles having reduced surface defects and assembly for use therein |
US6533880B1 (en) * | 1999-03-01 | 2003-03-18 | Meridian Automotive Systems, Inc. | Method of making a combination speaker grill and automotive interior trim panel |
US20020150274A1 (en) | 2001-04-11 | 2002-10-17 | Patent Holding Company | Plastic panel with integrally molded speaker grille |
US20050257998A1 (en) | 2004-05-18 | 2005-11-24 | Pioneer Corporation | Method for manufacturing speaker-use center cap |
US20060134250A1 (en) * | 2004-12-22 | 2006-06-22 | Henrotte Eric M | Method and apparatus to vent a mold |
US20070145637A1 (en) | 2005-12-26 | 2007-06-28 | Pioneer Corporation | Method of manufacturing speaker edge member |
US20140014286A1 (en) | 2011-03-11 | 2014-01-16 | Sintokogio, Ltd. | Die-casting die |
US20160228942A1 (en) | 2013-10-30 | 2016-08-11 | Toyota Jidosha Kabushiki Kaisha | Mold forming apparatus |
US20180250860A1 (en) * | 2016-04-15 | 2018-09-06 | Hi-Tech Mold & Engineering, Inc. | Die insert for molding a speaker grille and method of forming same |
Also Published As
Publication number | Publication date |
---|---|
US20170303021A1 (en) | 2017-10-19 |
WO2017181170A1 (en) | 2017-10-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9061617B2 (en) | Thin ventilated seat for a vehicle and items of furniture | |
US10144164B2 (en) | Die insert for molding a speaker grille and method of forming same | |
US9945600B2 (en) | Refrigerator | |
CA2328019C (en) | One piece molded roof for a vehicle cab | |
US10479240B2 (en) | Vehicle seat and seat element equipped with a ventilation system comprising a duct | |
US10149028B2 (en) | Die insert for molding a speaker grille | |
KR101264614B1 (en) | Rear air conditioning system for a car | |
JP4884989B2 (en) | Cushion pad molding method and cushion pad foaming mold | |
JP2017101573A (en) | Cooling liquid tank | |
CN217031770U (en) | Door body for refrigerator and refrigerator | |
CN112373400A (en) | Storage structure, vehicle with same and application | |
EP1046487B1 (en) | Molded resin plate with internal voids and method and system for manufacturing a molded resin plate | |
CN201363314Y (en) | Fan frame body | |
JP2000272330A (en) | Floor console | |
CN111434930B (en) | Fan frame | |
KR101889905B1 (en) | Cup holding apparatus for cooling and heating and its manufactoring method | |
CN213069162U (en) | Hidden breathable radar mounting seat and radar | |
KR20040049686A (en) | Shelves for refrigerator | |
CN111139992B (en) | Floor capable of preventing water accumulation | |
GB2607058A (en) | A vehicle seat sub-assembly and method | |
CN213321521U (en) | Heat dissipation device for automobile mold | |
CN216267381U (en) | Be used for fashioned mould of product of bending and injection molding machine | |
CN211279477U (en) | Anti-falling hardware injection mold | |
CN214726008U (en) | Injection mold for outer ring of preservation box | |
JP6507931B2 (en) | Vehicle seat |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HI-TECH MOLD & ENGINEERING, INC., MICHIGAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KILLORAN, STEVE;DEBENEDICTIS, ANTHONY;GESCHKE, DAVID;AND OTHERS;SIGNING DATES FROM 20170404 TO 20170414;REEL/FRAME:042269/0387 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
AS | Assignment |
Owner name: COMERICA BANK, AS AGENT, MICHIGAN Free format text: SECURITY INTEREST;ASSIGNOR:HI-TECH MOLD & ENGINEERING, INC.;REEL/FRAME:050890/0170 Effective date: 20191101 |
|
AS | Assignment |
Owner name: HI-TECH MOLD & ENGINEERING, INC., MICHIGAN Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:COMERICA BANK, AS AGENT;REEL/FRAME:056964/0878 Effective date: 20210723 |
|
AS | Assignment |
Owner name: CIBC BANK USA, ILLINOIS Free format text: SECURITY INTEREST;ASSIGNOR:HI-TECH MOLD & ENGINEERING, INC.;REEL/FRAME:058209/0976 Effective date: 20210712 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YR, SMALL ENTITY (ORIGINAL EVENT CODE: M2551); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY Year of fee payment: 4 |